Q.31)-A real gas can act as ideal gas at
  • Low pressure and high temperature
  • High pressure and low temperature
  • Low temperature and high pressure
  • High temperature and low pressure
Q.32)-A white and smooth surface is
  • Good absorber and good reflector of heat
  • Bad absorber and good reflector of heat
  • Good absorber and bad reflector of heat
  • Bad absorber and bad reflector of heat
Q.33)-A cycle tyre bursts suddenly.this represents an
  • Isothemal process
  • Adiabatic process
  • Isochoric process
  • Isobaric process
Q.34)-The wavelength at which the peak of intensity of black body radiation occurs
  • Increases with increase in temperature
  • Decreases with increase in temperature
  • Is the same at all temperature
  • Does not follow any pattern as temperature changes
Q.35)-A blackbody can absorb radiations of
  • Lower wavelengths only
  • Intermediate wavelength only
  • Higher wavelengths only
  • All wavelengths
Q.36)-In a refrigerator a cooling system should always be
  • At the top
  • At the botton
  • At the middle
  • Can be anywhere
Q.37)-In a refrigerator what produces cooling?
  • The ice which deposits on the freezer
  • The sudden expansion of a compressed gas
  • The evaporation of a compressed gas
  • None of these
Q.38)-Outside of cooking utensils are generally left black from below because
  • It is difficult to clean daily
  • Black surface is a good conductor of heat
  • Black surface is a poor conductor of heat
  • Black surface is a good absorber of heat
Q.39)-What is not true about temperature?
  • It is one of the seven SI base quantities
  • It is measured in degree celsius in SI unit
  • Temp 00C=273.15K.
  • All are true
Q.40)-Density of water is IG/CC. it is strictly valid at
  • 0 0C
  • 4 0C
  • 25 0C
  • 100 0C